title: Repeated administration of subconvulsant doses of GABA antagonist drugs. II. Effect on monoamine-mediated behaviour.
abstract: The effect on monoamine-medical behaviour of repeated daily subconvulsive doses of the GABA antagonist drugs pentylenetetrazol (PTZ) (30 mg/kg for 8 days), picrotoxin (5 mg/kg for 4 days) and bicuculline (3.5 mg/kg for 16 days) was investigated. None of the drugs, administered chronically, increased behavioural responses to the 5-hydroxytryptamine agonist quipazine (25 mg/kg), and neither picrotoxin nor bicuculline altered the locomotor response to the dopamine agonist apomorphine (AP) (0.1 mg/kg). By contrast, repeated doses of PTZ increased the locomotor response to AP, and also increased circling responses to both AP (0.5 mg/kg) and methamphetamine (2.0 mg/kg) in unilateral nigrostriatal-lesioned rats.
mesh_terms: D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D001522:Behavior, Animal / Q000187:drug effects*; D001640:Bicuculline / Q000494:pharmacology; D018756:GABA Antagonists; D006801:Humans; D007696:Kindling, Neurologic / Q000187:drug effects; D008297:Male; D008694:Methamphetamine / Q000494:pharmacology; D009043:Motor Activity / Q000187:drug effects; D010433:Pentylenetetrazole / Q000494:pharmacology; D010852:Picrotoxin / Q000494:pharmacology; D011814:Quipazine / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D011954:Receptors, Dopamine / Q000187:drug effects*; D011985:Receptors, Serotonin / Q000187:drug effects*; D013239:Stereotyped Behavior / Q000187:drug effects
chemical_list: D001058:Apomorphine; D001640:Bicuculline; D018756:GABA Antagonists; D008694:Methamphetamine; D010433:Pentylenetetrazole; D010852:Picrotoxin; D011814:Quipazine; D011954:Receptors, Dopamine; D011985:Receptors, Serotonin